Grass blocks that have "snowy" block state can generate in the world, even there is no snow, snow block or powder snow above it. Strangely, this is not happening when i use /tp command to go there.

seed: -8730405629769185297

cords: /execute in minecraft:overworld run tp @s -281.90 70.53 -77.28 -1169.27 39.60